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| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-03-14 17:05:48 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-03-14 17:05:48 +0000 |
| commit | 404d6be4313f6d4730c2cacecb097a7c9674f8f9 (patch) | |
| tree | e62afbba9e20ac34bc1bb3da1a97cb976122058a /gcc/df-scan.c | |
| parent | d944b0abcb5e783fa3c9828affe795ef8bebc2ee (diff) | |
| download | gcc-404d6be4313f6d4730c2cacecb097a7c9674f8f9.tar.gz | |
2008-03-14 Richard Guenther <rguenther@suse.de>
PR tree-optimization/34172
* tree-flow.h (refs_may_alias_p): Declare.
(get_single_def_stmt): Likewise.
(get_single_def_stmt_from_phi): Likewise.
(get_single_def_stmt_with_phi): Likewise.
* tree-dfa.c (refs_may_alias_p): New function.
(get_single_def_stmt): Likewise.
(get_single_def_stmt_from_phi): Likewise.
(get_single_def_stmt_with_phi): Likewise.
* tree-ssa-sccvn.c (get_def_ref_stmt_vuses): New function.
(vn_reference_lookup_1): New helper function.
(vn_reference_lookup): Walk the virtual use-def chain to
continue searching for a match if the def does not alias the
reference we are looking for.
* gcc.dg/tree-ssa/ssa-fre-11.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-12.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-13.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-14.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-15.c: Likewise.
* gcc.dg/tree-ssa/20031106-4.c: Remove XFAIL.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133222 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/df-scan.c')
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